6499546157 has 12 divisors (see below), whose sum is σ = 7153358004. Its totient is φ = 5901217920.

The previous prime is 6499546153. The next prime is 6499546213. The reversal of 6499546157 is 7516459946.

It can be written as a sum of positive squares in 6 ways, for example, as 2765602921 + 3733943236 = 52589^2 + 61106^2 .

It is not a de Polignac number, because 6499546157 - 2² = 6499546153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499546153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304928 + ... + 325545.

It is an arithmetic number, because the mean of its divisors is an integer number (596113167).

Almost surely, 2^6499546157 is an apocalyptic number.

It is an amenable number.

6499546157 is a deficient number, since it is larger than the sum of its proper divisors (653811847).

6499546157 is a wasteful number, since it uses less digits than its factorization.

6499546157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630560 (or 630547 counting only the distinct ones).

The product of its digits is 8164800, while the sum is 56.

The square root of 6499546157 is about 80619.7628190508. The cubic root of 6499546157 is about 1866.2121421653.

The spelling of 6499546157 in words is "six billion, four hundred ninety-nine million, five hundred forty-six thousand, one hundred fifty-seven".